SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 32
Alarm No.: 32
Name: Overcurrent
Alarm content
・
A current higher than the permissible current was applied to the driver.
Detail
No.
Detail name
Cause
Check method
Check result
Action
32.1
Overcurrent
detected at
hardware
detection circuit
(during
operation)
(1)
The driver is
malfunctioning.
Disconnect the servo
motor power cables
(U/V/W) and check if
the alarm occurs.
It occurs.
Replace the driver.
It does not occur.
Check (2).
(2)
A ground fault or short
occurred at the servo
motor power cable.
Check if only the servo
motor power cable is
shorted.
It is shorted.
Replace the servo motor
power cable.
It is not shorted.
Check (3).
(3)
The servo motor is
malfunctioning.
Disconnect the servo
motor power cables on
motor side, and check
insulation of the
motor (between
U/V/W/ /―)
A ground fault is
occurring.
Replace the servo motor.
A ground fault is not
occurring.
Check (4).
(4)
The dynamic brake is
malfunctioning.
Check if the alarm
occurs
when you turn on the
servo-on command.
It occurs.
Replace the driver.
It does not occur.
Check (7).
(5)
Something near the
device caused it.
Check the noise,
ambient temperature,
etc.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
There is no problem
in the surrounding
Check it with the check
method for [AL. 45.1].
Alarm No.: 32
Name: Overcurrent
Alarm content
・
A current higher than the permissible current was applied to the driver.
Detail
No.
Detail name
Cause
Check method
Check result
Action
32.2
Overcurrent
detected at
software
detection
function (during
operation)
(1)
The servo gain is high.
Check if an oscillation
is occurring.
An oscillation is
occurring.
Reduce the speed loop
gain ([Pr. PB09]).
An oscillation is not
occurring.
Check (2).
(2)
The driver is
malfunctioning.
Disconnect the servo
motor power cables
(U/V/W) and check if
the alarm occurs.
It occurs.
Replace the driver.
It does not occur.
Check (3).
(3)
A ground fault or short
occurred at the servo
motor power cable.
Check if only the servo
motor power cable is
shorted.
It is shorted.
Replace the servo motor
power cable.
It is not shorted.
Check (4).
(4)
The servo motor is
malfunctioning.
Disconnect the servo
motor power cables on
motor side, and check
insulation of the motor
(between U/V/W/ / ).
A ground fault is
occurring.
Replace the servo motor.
A ground fault is not
occurring.
Check (5).
(5)
Something near the
device caused it.
Check the noise,
ambient temperature,
etc.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
32.3
Overcurrent
detected at
hardware
detection circuit
(during a stop)
Check it with the check method for [AL. 32.1].
32.4
Overcurrent
detected at
software
detection
function (during
a stop))
Check it with the check method for [AL. 32.2].

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English